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METHODOLOGICAL NOTES

Are the Kramers–Kronig relations for the dielectric permittivity of a material always valid?

D. A. Kirzhnits

P. N. Lebedev Physical Institute, the USSR Academy of Sciences, Moscow

UDC: 537.226.2(018)

PACS: 77.20.+y

DOI: 10.3367/UFNr.0119.197606f.0357

 English version: Physics–Uspekhi, 1976, 19:6, 530–537